, 18.10.2019 11:00, piyush872850

# 15. 200 logs are stacked in the following manner: 20 logs in the bottom row, 19 in the next row, 18 in the row next to it and so on. in how may rows are the 200 logs placed and how many logs are in the top row? standard: - 10❎ don't spamming ❎

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$$\displaystyle \text{find all integers x for which}displaystyle{(5x-1)\ \textless \ (x+1)^2\ \textless \ (7x-3).}$$